Find the characteristic polynomial of the matrix A=(2314)A = \begin{pmatrix} 2 & 3 \\ 1 & 4 \end{pmatrix}A=(2134).
λ2−6λ+5\lambda^2 - 6\lambda + 5λ2−6λ+5
λ2−6λ−1\lambda^2 - 6\lambda - 1λ2−6λ−1
λ2−5λ+5\lambda^2 - 5\lambda + 5λ2−5λ+5
λ2+6λ+5\lambda^2 + 6\lambda + 5λ2+6λ+5